How to resolve the problem of Failed to find assets path for "Frameworks/App.framework/flutter_assets"

I packaged into cocoapods

Then run pod install

And the clickAction is FlutterViewController* c = [[FlutterViewController alloc]init];
[self.navigationController presentViewController:c animated:YES completion:nil];

At last the console output Failed to find assets path for "Frameworks/App.framework/flutter_assets"

Could you please help me? please. It's so important to me, I can pay for the solution